1143587123 has 4 divisors (see below), whose sum is σ = 1306956720. Its totient is φ = 980217528.

The previous prime is 1143587111. The next prime is 1143587153. The reversal of 1143587123 is 3217853411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1143587123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143587153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81684788 + ... + 81684801.

It is an arithmetic number, because the mean of its divisors is an integer number (326739180).

Almost surely, 2^1143587123 is an apocalyptic number.

1143587123 is a deficient number, since it is larger than the sum of its proper divisors (163369597).

1143587123 is an equidigital number, since it uses as much as digits as its factorization.

1143587123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163369596.

The product of its digits is 20160, while the sum is 35.

The square root of 1143587123 is about 33816.9650175766. The cubic root of 1143587123 is about 1045.7384714807.

The spelling of 1143587123 in words is "one billion, one hundred forty-three million, five hundred eighty-seven thousand, one hundred twenty-three".